Anthera reports increase in second quarter total operating expenses to $22.7 million

Anthera Pharmaceuticals, Inc. (Nasdaq: ANTH), today announced financial results and business highlights for the quarter ended June 30, 2011.

Financial Results:

Total operating expenses for the second quarter ended June 30, 2011 were $22.7 million, as compared to $7.9 million for the same period in 2010. For the six months ended June 30, 2011, total operating expenses were $41.3 million, as compared to $14.4 million for the same period in 2010. Increased operating expenses in the second quarter of 2011 can be attributed to accelerating enrollment of our Phase 3 VISTA-16 cardiovascular study (Vascular Inflammation Suppression to Treat Acute Coronary Syndrome - 16 Weeks) following the recent completion of the interim biomarker analysis. VISTA-16 is an event driven study in Acute Coronary Syndrome (ACS) patients studying the benefit of varespladib anti-inflammatory treatment in high risk patients. Additionally, enrollment of Anthera's Phase 2b Lupus study, PEARL-SC (A Randomized, Double-Blind Phase 2b Study to Evaluate the Efficacy, Safety, and Tolerability of A623 AdministRation in Subjects with Systemic Lupus Erythematosus) has exceeded expectations. During the second quarter we accelerated manufacturing activity related to the development of blisibimod (A-623), our large molecule inhibitor of BAFF being dosed in the PEARL-SC clinical study, which also contributed to incremental expenses.

Anthera ended the second quarter of 2011 with approximately $112.1 million in cash and cash equivalents and short-term investments, which includes approximately $54.0 million of net proceeds received from a public offering, which closed on June 8, 2011. This is compared to $78.5 million in cash and cash equivalents and short-term investments for the first quarter ended March 31, 2011.

Recent Business Highlights and Upcoming Events:

Clinical

• Primary endpoint events for the Phase 3 VISTA-16 study continue to accrue according to the Company's estimates.  As of June 30, 2011 VISTA-16 has collected over 175 reported Major Adverse Cardiovascular Events (MACE) that may qualify as a primary endpoint event.  VISTA-16 remains on track to accrue the 385th event in early Q1 2012. Enrollment in VISTA-16 will be stopped after a minimum of 385 primary endpoints have occurred. As per a Special Assessment agreement with the US FDA, the primary endpoint of the VISTA-16 study is a reduction in major adverse coronary events (MACE) defined by recent FDA draft guidance to include cardiovascular death, non-fatal myocardial infarction, non-fatal stroke or documented unstable angina with objective evidence of ischemia requiring hospitalization. Details regarding the study can be found at http://www.clinicaltrials.gov/ct2/show/NCT01130246. The next substantial DSMB review of clinical safety and efficacy data is planned once 50 percent of the anticipated primary endpoints have occurred and been adjudicated.
• Subsequent to June 30, 2011, the VISTA-16 Data Safety Monitoring Board (DSMB) met in early July 2011 to review the available clinical safety data and, for the fourth time since the start of enrollment, recommended the study continue without change to the protocol.
• Enrollment and site initiations for the PEARL-SC study continue according to the Company's estimated timelines.  As of June 30, 2011 enrollment in PEARL-SC had surpassed 50% of target and remains on track to randomize the last patient in Q4 2011. PEARL-SC is examining the therapeutic benefit of subcutaneous blisibimod (A-623), an inhibitor of both soluble and membrane-bound BAFF in patients with systemic lupus erythematosus (Lupus). The primary endpoint of the PEARL-SC study will be an SLE responder index. Details regarding the study can be found at http://www.clinicaltrials.gov/ct2/show/NCT01162681.
• In Q2 2011, the DSMB met to review the available clinical safety data for the PEARL-SC clinical study and recommended the study continue without change to the protocol.

Manufacturing

• The Company completed its first blisibimod (A-623) GMP purification campaign lot at Fujifilm Diosynth Biotechnologies. The lot has passed all release specifications and will be released for clinical use in late Q3. The data from this GMP campaign will be submitted to FDA as a part of the Comparability plan for blisibimod.